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Use a special sampler for 2D shadows, so they are softer

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This commit is contained in:
Juan Linietsky 2019-07-08 09:53:40 -03:00
parent f04359e70f
commit a3f8ffac63
4 changed files with 42 additions and 21 deletions
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15
servers/visual/rasterizer/rasterizer_canvas_rd.cpp
View file

@ -1302,6 +1302,14 @@ void RasterizerCanvasRD::_update_canvas_state_uniform_set() {
uniforms.push_back(u_shadows);
}
{
RD::Uniform u;
u.type = RD::UNIFORM_TYPE_SAMPLER;
u.binding = 4;
u.ids.push_back(state.shadow_sampler);
uniforms.push_back(u);
}
state.canvas_state_uniform_set = RD::get_singleton()->uniform_set_create(uniforms, shader.default_version_rd_shader, 3); // uses index 3
}
@ -1937,6 +1945,13 @@ RasterizerCanvasRD::RasterizerCanvasRD(RasterizerStorageRD *p_storage) {
{ //state allocate
state.canvas_state_buffer = RD::get_singleton()->uniform_buffer_create(sizeof(State::Buffer));
state.lights_uniform_buffer = RD::get_singleton()->uniform_buffer_create(sizeof(LightUniform) * MAX_RENDER_LIGHTS);
RD::SamplerState shadow_sampler_state;
shadow_sampler_state.mag_filter = RD::SAMPLER_FILTER_LINEAR;
shadow_sampler_state.min_filter = RD::SAMPLER_FILTER_LINEAR;
shadow_sampler_state.repeat_u = RD::SAMPLER_REPEAT_MODE_REPEAT; //shadow wrap around
shadow_sampler_state.compare_op = RD::COMPARE_OP_GREATER;
state.shadow_sampler = RD::get_singleton()->sampler_create(shadow_sampler_state);
}
}

1
servers/visual/rasterizer/rasterizer_canvas_rd.h
View file

@ -293,6 +293,7 @@ class RasterizerCanvasRD : public RasterizerCanvas {
RID lights_uniform_buffer;
RID canvas_state_buffer;
RID shadow_sampler;
//uniform set for all the above
RID canvas_state_uniform_set;

45
servers/visual/rasterizer/shaders/canvas.glsl
View file

@ -522,33 +522,36 @@ FRAGMENT_SHADER_CODE
//float distance = length(shadow_pos);
float shadow;
uint shadow_mode = light_array.data[light_base].flags&LIGHT_FLAGS_FILTER_MASK;
vec4 shadow_uv = vec4(tex_ofs,0.0,distance,1.0);
if (shadow_mode==LIGHT_FLAGS_SHADOW_NEAREST) {
shadow = step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs,0.0)).x,distance);
shadow = textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv).x;
} else if (shadow_mode==LIGHT_FLAGS_SHADOW_PCF5) {
float shadow_pixel_size = light_array.data[light_base].shadow_pixel_size;
vec4 shadow_pixel_size = vec4(light_array.data[light_base].shadow_pixel_size,0.0,0.0,0.0);
shadow = 0.0;
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size*2.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size*2.0,0.0)).x,distance);
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size*2.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size*2.0).x;
shadow/=5.0;
} else if (shadow_mode==LIGHT_FLAGS_SHADOW_PCF13) {
float shadow_pixel_size = light_array.data[light_base].shadow_pixel_size;
vec4 shadow_pixel_size = vec4(light_array.data[light_base].shadow_pixel_size,0.0,0.0,0.0);
shadow = 0.0;
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size*6.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size*5.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size*4.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size*3.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size*2.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs-shadow_pixel_size,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size*2.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size*3.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size*4.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size*5.0,0.0)).x,distance);
shadow += step(texture(sampler2D(shadow_textures[texture_idx],texture_sampler),vec2(tex_ofs+shadow_pixel_size*6.0,0.0)).x,distance);
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size*6.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size*5.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size*4.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size*3.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size*2.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv-shadow_pixel_size).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size*2.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size*3.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size*4.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size*5.0).x;
shadow += textureProj(sampler2DShadow(shadow_textures[texture_idx],shadow_sampler),shadow_uv+shadow_pixel_size*6.0).x;
shadow/=13.0;
}

2
servers/visual/rasterizer/shaders/canvas_uniforms_inc.glsl
View file

@ -121,3 +121,5 @@ layout(set = 3, binding = 1, std140) uniform LightData {
layout(set = 3, binding = 2) uniform texture2D light_textures[MAX_LIGHT_TEXTURES];
layout(set = 3, binding = 3) uniform texture2D shadow_textures[MAX_LIGHT_TEXTURES];
layout(set = 3, binding = 4) uniform sampler shadow_sampler;